The first-class Europass, begun last year, covers three, four or five contiguous countries: France, Germany, Italy, Spain and Switzerland.

Passes in the 5-to-10-day range are limited to three or four contiguous countries, which the traveler chooses when buying the ticket.

Travelers can leave to contiguous countries (Canada, Mexico and the Caribbean), but will not be granted another 90 days after reentry in the United States.

The point is to plan a 10-day trip across contiguous countries: Burkina Faso and Togo were new to me.

It also contains plentiful data on the history and culture of contiguous countries.

Citizens or nationals of other countries cannot be claimed as dependents unless they also reside in the U.S. or in contiguous countries.

As for the Albanians, some six million live where they have for generations, in what are now three contiguous countries.

The U.S.-Mexico wage gap is among the largest between contiguous countries.

In many large, contiguous countries like China, there are many autonomous regions where a minority population is the majority.

In short, each Pellucidarian is a walking geography of his own district and of much of the country contiguous thereto.